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Denominators written by antidiagonals of interleaved A063524(n) and A002427(n)/A006955(n).
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%I #13 Dec 12 2013 02:59:50

%S 1,1,1,1,1,1,2,2,2,2,1,2,1,2,1,6,6,3,3,6,6,1,6,3,1,3,6,1,6,6,1,3,3,1,

%T 6,6,1,6,3,3,1,3,3,6,1,10,10,15,5,15,15,5,15,10,10,1,10,5,15,15,1,15,

%U 15,5,10,1

%N Denominators written by antidiagonals of interleaved A063524(n) and A002427(n)/A006955(n).

%C The numerators of Br(n)=0, 1, 1, 1/2, 0, -1/6, 0, 1/6, 0, -3/10, 0, 5/6, 0,... are in A229979(n).

%C (Corresponding complementary Euler numbers Er(n):

%C A198631(2n+1)/A006519(2n+2)=1/2, -1/4, 1/2, -17/8, 31/2, -691/4,... =Ef2(n). (2*n+2)*Ef2(n)=1, -1, 3, -17, 155, 2073,...=-A001469(n+1),Genocchi numbers. Er(n)=interleaved (A063524(n) and -A001469(n+1)) =0, 1, 1, -1, 0, 3, 0, -17, 0, 155,... =-A226158(n).)

%e 1,

%e 1, 1,

%e 1, 1, 1,

%e 2, 2, 2, 2,

%e 1, 2, 1, 2, 1,

%e 6, 6, 3, 3, 6, 6, etc.

%e Triangle of denominators of Br(n),complementary Bernoulli numbers,written by antidiagonals (see A229979).

%K nonn,frac,less

%O 0,7

%A _Paul Curtz_, Nov 30 2013